Tractel Dynafor Pro Wireless Digital Dynamometer

The Tractel Dynafor Pro is a versatile, robust wireless digital dynamometer covering 1 t to 250 t, the widest capacity range of the Dynafor family. It uses the same strain-gauge principle and 2.4 GHz radio plus Bluetooth link as the Expert, with 0.2 percent accuracy, and it is intended for heavy-lift projects, water-bag load testing, overhead weighing, towing and load monitoring of lifting equipment. Eight models give a standard code for every size from 1 t to 250 t.

Heavy-lift and proof-load work

The sheet lists the applications as overhead weighing, force measurement testing, water bag load testing, towing, safety and lifting applications, heavy-lift projects, research and development projects, and load monitoring on lifting equipment. For proof loading of cranes, davits and anchor points, a calibrated load cell in line with the test mass is the standard method, and water bags allow test masses to be built without heavy blocks. The wireless range of up to 400 m to the Dynafor HHD or AL63/128 large displays lets the operator and the observers read the same value from a safe distance, and the DMU unit manages thresholds.

Technical specifications

Models, codes and weights

The table comes from technical sheet T-7053; the resolution is the smallest displayed step.

Selecting a Dynafor Pro and what to confirm

Pick the model with a WLL above the largest load but no more than about ten times the smallest load of interest, because the sheet gives a minimum load of 10 percent of the WLL. Note the weight: the 100 t and 250 t cells weigh 27 kg and 98 kg and need lifting equipment themselves, and their end fittings must match the shackle sizes in the rigging. Radio range is open-field range; steel structures, buildings and weather reduce it. Specify the IP67 option if the cell will be immersed or washed, and remember that the accuracy figure changes with the option. Check the radio approvals for the country of use and ask for the calibration certificate that matches your quality plan.

Record the serial number and the calibration date of each cell, because a reading is only as dependable as the calibration behind it, and have the cell checked again after any shock load or overload event. Keep spare batteries with the kit.

Documents and quotation

The technical sheet is attached, and the manufacturer also offers a manual and a flyer. Seven Star LLC is an independent supplier that quotes the load cell together with displays and shackles. Related equipment can be found in Material Handling and Lifting Equipment.